Security lock, totally mechanical and keyless constituted by a unitary assembly comprising: 1) a combinatory device; 2) an anchoring system and 3) an alarm system. Combinatorial device characterized by being formed by A) an outer plate where the control buttons bearing on the inside of the portaclavijas discs are housed; the pull-knob to move from outside the movable plate and simultaneously to actuate the anchoring system. B) a movable plate whose inner side are the combination dials and its other face, the locking latch.
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